1. Department of Plastic Surgery, Peking Union Medical College Hospital, Beijing, China;
2. Department of Ear-Nose-Throat, Qingdao Huangdao District Hospital of Traditional Chinese Medicine, Shandong, China;
3. International Education College, Beijing Vocational College of Agriculture, Beijing, China
4. Center of Excellence in Tissue Engineering, Institute of Basic Medical Sciences and School of Basic Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China;